PouchDB is a pocket-sized database.
Selectize is the hybrid of a textbox and <select> box. It's jQuery based and it has autocomplete and native-feeling keyboard navigation; useful for tagging, contact lists, etc.
The official jQuery user interface library.
A package manager for the web, created at Twitter
Medium.com WYSIWYG editor clone.
browser-side require() the node.js way
Realtime MVC Framework for Node.js
Ajax with less suck - (and node.js HTTP client to match)
E2E test framework for Angular apps
jQuery Validation Plugin
Super simple WYSIWYG editor